An updated sample selection is being determined for one of our most comprehensive energy establishment surveys, to more efficient estimate for the current population, as the sample has not been reselected in seven years. There are many combinations of categories for which we report, using small area estimation, and we would like to use some clear graphics to show management comparisons between test results using the past sample and the new one, also including before and after sample sizes, and before and after relative standard errors. I have JMP software on my PC at work, but I primarily just use it for running scatterplots. Does anyone have any suggestions for graphical presentations using JMP that would display the above comparative information well? Thanks.
Try using JMPs Attribute/variability platform. It is located in the pulldown menu Analyze->Quality/Process->Attribute/Variability/Gauge.
I do not think you need the statistical functions that this will give you, however, if you add your data to Y, and then list the groups you want to show the sampling difference in , then have the last x be a label for which sampling method you used. This will create a plot that shows for each reported type of data, the difference in the sampling plan.
Another method may be to use the Analyze fit Y by X where the Y's are the data you sampled, and the X is the sampling method. You can then set up the BY group as a column in your dataset that lists the test type.
Much of using JMP comes down to how you arrange the data going in. I like to have a column that lists the split, or sample group, a column that lists the tested parameter, and then one for the actual value. This enables the first type of analysis that I mentioned. I hope this helps get you started.
Mathew -
Thank you for the advice.
I actually wrote this question months ago, and have retired since then, and tried to pull this question, but did not figure out how. However, I still know someone at work to whom I will refer your answer. Also, the person I was working with at the time moved to another agency, but I will forward it to him, as well. And of course others may read your response.
Thank you - Jim
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